3 of our cranks have failed. Common problem. My husband found the part that needs to be replaced (the operator) aka gear box, after much searching and phone calls from
www.mobilehomepartsstore.com. 910-277-7202. Part number WCM#812. “Jalousie window center mount operator”. It was $9.99 plus S&H. It took him 30 mins to change it out. He has now ordered 7 more as he assumes all will fail.